Kerkis exists for one situation: you are responsible for a lot of premises, the duties differ site by site, and one day someone will ask you to justify a decision made years earlier by somebody who has since left.
The Terrorism (Protection of Premises) Act 2025 puts a duty on a named responsible person. For a single venue that is manageable with the free templates the Home Office and ProtectUK already publish, and if that is your situation you should use them.
It stops being manageable at scale. Forty premises means forty capacity figures, each one determining a different tier, each tier carrying different duties, each procedure ageing at a different rate, and staff turnover quietly eroding the one thing you thought was settled. The failure is rarely that nobody wrote anything down. It is that nobody can find the version that was current on the day it mattered.
That is a record-keeping problem before it is a security problem, and record-keeping is what software is genuinely good at.
Neither staff training nor drills are required by the Act, standard tier premises submit nothing beyond a notification, and there is no documentation duty below 800. A vendor that lets you believe otherwise sells more. We would rather you bought the thing you actually need.
Every tier determination records the occupancy figure, where it came from, which areas were counted and who signed it off. A judgement made in 2026 has to still hold when it is questioned in 2029, and it only holds if you can see how it was reached.
Sites that fall out of scope cost nothing. That removes any incentive to nudge a borderline site upward, and it is what makes the free scope check safe to be honest with you.
Every table is protected by database-level row security, and a test suite seeds two organisations and asserts that neither can see a single row belonging to the other. It runs on every change, and it fails the build if a policy is ever dropped.
A kerkis is the wedge of seating between the stairways of a Greek theatre. The stairways are why the wedge is that shape: they are how a full house gets out. Every seat in it was placed knowing where the crowd would go.
That is the argument of this product in one word. The number of people you expect is the number that decides everything, and planning for them leaving safely is not an afterthought bolted onto the building — it is what determines the shape of it.
The free scope check is live. The platform is in build, and we are looking for the first design partners ahead of the duties commencing — expected in spring 2027, though not yet appointed by regulations.
Customer data on the paid platform will be held in the United Kingdom. Our sub-processor list, our security update commitment and our incident response process are being written now, and they will be published here before we sell to a first customer rather than assembled once someone asks.
Kerkis is a record-keeping tool. Responsibility for meeting the duties rests with the responsible person, and nothing here is legal advice.